For me this page loads and displays fine, only after about 2 seconds Github displays a loading error. Makes no sense.

Block JavaScript and you can see it.

I think that's because GitHub is trying to load the dozens of awful comments on the commit by people with usernames like waifuconnoisseur lamenting the loss of the politically incorrect, Hitler-loving grok. For what it's worth, they unfortunately load for me in Safari but it takes ~10 seconds.

Yeah, I also see tons of comments in there loading up, and then at some point the page "crashes" and you get the "unable to load" page

I logged in and it started working

Happens to me, too